Help mindat.org|Log In|Register|
Home PageMindat NewsThe Mindat ManualHistory of MindatCopyright StatusManagement TeamContact UsAdvertise on Mindat
Donate to MindatSponsor a PageSponsored PagesTop Available PagesMindat AdvertisersAdvertise on MindatThe Mindat Store
Minerals by PropertiesMinerals by ChemistryRandom MineralSearch by minIDLocalities Near MeSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
StatisticsThe ElementsMember ListBooks & MagazinesMineral Shows & EventsThe Mindat DirectoryHow to Link to MindatDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Eirikite

This page kindly sponsored by Douglas Merson
Eric the Red (Eiríkur rauði)
Formula:
KNa6Be2(Si15Al3)O39F2
System:
Trigonal
Colour:
White to colorless
Hardness:
6
Member of:
Name:
Named after Eirik Raude (950-1003), discoverer of Greenland and father of Leiv (Leif) Eiriksson, after whom leifite is named.
Leifite Group.
The K analogue of leifite and telyushenkoite.

Classification of Eirikite

Approved
Approval Year:
2007
9.EH.25

9 : SILICATES (Germanates)
E : Phyllosilicates
H : Transitional structures between phyllosilicate and other silicate units
76.2.11.3

76 : TECTOSILICATES Al-Si Framework
2 : Al-Si Framework Feldspathoids and related species
mindat.org URL:
http://www.mindat.org/min-36060.html
Please feel free to link to this page.

Type Occurrence of Eirikite

General Appearance of Type Material:
finely or coarsely fibrous, monomineralic aggregates up to several centimetres across
Place of Conservation of Type Material:
Department of Geology, Natural History Museum, University of Oslo (catalogue no. 41773).
Geological Setting of Type Material:
A nepheline-syenite pegmatite

Physical Properties of Eirikite

Vitreous, Silky
Colour:
White to colorless
Streak:
White
Hardness (Mohs):
6
Tenacity:
Brittle
Cleavage:
Distinct/Good
{1010}
Fracture:
Irregular/Uneven, Conchoidal
Density:
2.59(1) g/cm3 (Measured)    2.577 g/cm3 (Calculated)

Crystallography of Eirikite

Crystal System:
Trigonal
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Space Group:
P3m1
Space Group Setting:
P3m1
Cell Parameters:
a = 14.3865(9) Å, c = 4.8733(4) Å
Ratio:
a:c = 1 : 0.339
Unit Cell Volume:
V 873.50 ų (Calculated from Unit Cell)
Z:
1
X-Ray Powder Diffraction Data:
d-spacingIntensity
4.710 (29)
4.153 (21)
3.386 (70)
3.161 (100)
3.115 (17)
2.466 (31)
2.398 (19)
2.217 (20)

Optical Data of Eirikite

Type:
Uniaxial (+)
RI values:
nω = 1.517() nε = 1.521(1)
Max Birefringence:
δ = 0.004
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Low
Pleochroism:
Non-pleochroic

Chemical Properties of Eirikite

Formula:
KNa6Be2(Si15Al3)O39F2
All elements listed in formula:

Relationship of Eirikite to other Species

Member of:
Other Members of Group:
Leifite(Na,H2O)Na6[Be2Al2(Al,Si)Si15O39]F2
Telyushenkoite(Cs,Na,K)Na6[F2|Be2Al3Si15O39]
9.EH.05ManganoneptuniteNa2KLiMn22+Ti2Si8O24
9.EH.05NeptuniteNa2KLiFe22+Ti2Si8O24
9.EH.05WatatsumiiteNa2KLi(Mn2+,Fe2+)2V24+[Si8O24]
9.EH.05MagnesioneptuniteKNa2Li(Mg,Fe)2Ti2Si8O24
9.EH.10GrumantiteNa(HSi2O5) · H2O
9.EH.15SarcoliteNa4Ca12Al8Si12O46(SiO4,PO4)(OH,H2O)4(CO3,Cl)
9.EH.20UssingiteNa2AlSi3O8OH
9.EH.25Leifite(Na,H2O)Na6[Be2Al2(Al,Si)Si15O39]F2
9.EH.25Telyushenkoite(Cs,Na,K)Na6[F2|Be2Al3Si15O39]
9.EH.30NafertisiteNa3Fe102+Ti2(Si6O17)2O2(OH)6F(H2O)2

Other Names for Eirikite

Name in Other Languages:

Other Information

Other Information:
insoluble in warm 6 M HCl, melts relatively easily using a gas torch, leaving a white, vesicular globule
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Eirikite

Reference List:
Larsen, A.O., Kolitsch, U., Gault, R.A., Giester, G. (2010): Eirikite, a new mineral species of the leifite group from the Langesundsfjord district, Norway. European Journal of Mineralogy, 22, 875-880.

Armstrong, J.A., Friis, H., Lieb, A., Finch, A.A., Weller, M.T. (2010): Combined single-crystal X-ray and neutron powder diffraction structure analysis exemplified through full structure determinations of framework and layer beryllate minerals. American Mineralogist, 95, 519-526. [refinement of Na-bearing leifite]

Larsen, A. O. (ed.) (2010): The Langesundsfjord. History, geology, pegmatites, minerals. Bode Verlag Gmbh, Salzhemmendorf, Germany, 240 pp [p 112-113]

HORVÁTH, L. (2009) Bertrandite, eirikite and a review of beryllium minerals from Mont Saint-Hilaire. MICRONEWS, 43(5), 9-12.

Internet Links for Eirikite

Localities for Eirikite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Canada
 
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
LARSEN, A.O., KOLITSCH, U., GAULT, R.A. and GIESTER,G. (2010) Eirikite, a new mineral species of the leifite group from the Langesundsfjord district, Norway. European Journal of Mineralogy, 22, 875-880. Can. Museum of Nature & Horváth collections;
HORVÁTH, L. (2009) Bertrandite, eirikite and a review of beryllium minerals from Mont Saint-Hilaire. MICRONEWS, 43(5), 9-12.
Norway (TL)
 
  • Vestfold
    • Larvik
      • Langesundsfjorden
        • Vesle Arøya
Larsen, A. O. (ed.) (2010): The Langesundsfjord. History, geology, pegmatites, minerals. Bode Verlag Gmbh, Salzhemmendorf, Germany, 240 p: Larsen, A.O., Kolitsch, U., Gault, R.A. & Giester, G. (2010): Eirikite a new mineral species of the leifite group from the Langesundsfjord district, Norway. European Journal of Mineralogy. 22, 875–880
Russia
 
  • Northern Region
    • Murmanskaja Oblast'
      • Kola Peninsula
        • Lovozero Massif
          • Alluaiv Mt
            • Umbozero mine (Umbozerskii mine; Umba Mine)
Pavel M. Kartashov data
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2016, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: July 23, 2016 20:18:21 Page generated: July 20, 2016 17:52:42